Module: DTK::DSL::Template::Parsing::ParentKey::Index

Defined in:
lib/dsl/template/parsing/parent_key.rb

Constant Summary collapse

LEFT_DELIM = 
'['
RIGHT_DELIM = 
']'

Class Method Summary collapse

Class Method Details

.parse_segment(key_seqment) ⇒ Object

returns [type, index] where index can be nil



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# File 'lib/dsl/template/parsing/parent_key.rb', line 54

def self.parse_segment(key_seqment)
  type = index = nil
  split_on_left = key_seqment.split(LEFT_DELIM)
  if split_on_left.size == 1
    type = key_seqment
  else 
    type = split_on_left.shift

    # find index
    # being robust if index has index symbols in it by looking for leftmost left deleim and rightmost right delim
    rest = split_on_left.join(LEFT_DELIM)
    split_on_right = rest.split(RIGHT_DELIM)
    if split_on_right.size == 1
      index = split_on_right.first
    else
      split_on_right.pop # get rid of end
      index = split_on_right.join(RIGHT_DELIM)
    end
  end
  [type, index]
end

.with_delims(index) ⇒ Object 



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# File 'lib/dsl/template/parsing/parent_key.rb', line 49

def self.with_delims(index)
  "#{LEFT_DELIM}#{index}#{RIGHT_DELIM}"
end